72 lines
2.8 KiB
Java
72 lines
2.8 KiB
Java
/*
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* Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test TestElasticTLABDecay
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* @key gc
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* @requires vm.gc.Epsilon & !vm.graal.enabled
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* @summary Epsilon is able to work with/without elastic TLABs
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*
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* @run main/othervm -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonElasticTLAB -XX:-EpsilonElasticTLABDecay TestElasticTLABDecay
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* @run main/othervm -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonElasticTLAB -XX:+EpsilonElasticTLABDecay -XX:EpsilonTLABDecayTime=1 TestElasticTLABDecay
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* @run main/othervm -Xmx1g -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC -XX:+EpsilonElasticTLAB -XX:+EpsilonElasticTLABDecay -XX:EpsilonTLABDecayTime=100 TestElasticTLABDecay
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*/
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import java.util.Random;
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public class TestElasticTLABDecay {
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static long SEED = Long.getLong("seed", System.nanoTime());
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static int COUNT = Integer.getInteger("count", 3000); // ~500 MB allocation
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static byte[][] arr;
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public static void main(String[] args) throws Exception {
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Random r = new Random(SEED);
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arr = new byte[COUNT * 100][];
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for (int c = 0; c < COUNT; c++) {
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arr[c] = new byte[c * 100];
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for (int v = 0; v < c; v++) {
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arr[c][v] = (byte)(r.nextInt(255) & 0xFF);
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}
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Thread.sleep(5);
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}
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r = new Random(SEED);
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for (int c = 0; c < COUNT; c++) {
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byte[] b = arr[c];
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if (b.length != (c * 100)) {
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throw new IllegalStateException("Failure: length = " + b.length + ", need = " + (c*100));
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}
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for (int v = 0; v < c; v++) {
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byte actual = b[v];
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byte expected = (byte)(r.nextInt(255) & 0xFF);
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if (actual != expected) {
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throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual);
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}
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}
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}
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}
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}
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